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Revenue - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Net revenue $ 9,510 $ 8,634
Revenue, remaining performance obligation, amount 4,300  
Value-Added Services    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Net revenue $ 2,400 $ 2,100
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years) 2 years  
Revenue, remaining performance obligation (in percent) 50.00%  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction, period (in years)  
Revenue, remaining performance obligation (in percent) 50.00%